After performing his smash “Blurred Lines” with T.I. and Pharrell in May, Robin Thicke returned to NBC’s “The Voice” on Monday. Sitting at the piano, the blue-eyed soul man performed his new single “Feel Good” as Adam Levine and CeeLo Green looked on. He made his way on top of the sparkly piano, while disco balls shined down on him and sweated dripped down his face.